/ Dictionary / Index P Pliofilm: Meaning and Definition of Find definitions for: Pli•o•film Pronunciation: (plī'u-film"), [key] — Trademark. Trademark. a brand of resinlike rubber hydrochloride that forms a clear, flexible, water-resistant, heat-sealable plastic, used for packaging, raincoats, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pliocene pliotron Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language